British Standards Institution

Source:: ISO
Committee:: W/- - Miscellaneous Standards
Categories:: Pigments and extenders
Comment period start date:: 06/05/2025
Comment period end date:: 29/06/2025
Number of comments:: 0

Comment by:

29th Jun

Scope

This document specifies sample preparation methods to determine the size distribution of separate particles of a single pigment or extender, which is dispersed in a liquid by application of a standardized dispersion procedure, using an ultrasonic device, shaker device or wet jet mill.

The sample preparation methods described are optimized for measurements carried out with a particle sizing technique based on sedimentation. This technique relies on particle migration due to gravitation or centrifugal forces and requires a density contrast between the particles and the liquid phase.

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Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal (Complete)

Proposal start date:

2. Draft (Complete)

Draft start date:

23/10/2024

3. Public Comments

Public Comments start date:

06/05/2025

Public Comments end date:

29/06/2025

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Standards Development

BS EN ISO 20427 Pigments and extenders — Dispersion procedure for sedimentation-based particle sizing of suspended pigment or extender with liquid sedimentation methods

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